#424D75
Closest named color: Dusk (#4E5481). oklch(42.9% 0.068 271.6), rgb(66, 77, 117).
Aa
White text reads best on this color (8.23:1).
About this color
#424D75 is a dark, muted blue. In OKLCH its lightness is 43%, its chroma 0.068 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk (#4E5481), ΔE 0.033 away. White text reads best on it, at 8.23:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Dusk (#4E5481) |
| Black text | 2.55:1 |
| White text | 8.23:1 |
Values
| HEX | #424D75 |
| RGB | rgb(66, 77, 117) |
| HSL | hsl(227, 28%, 36%) |
| OKLCH | oklch(42.9% 0.068 271.6) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #424D75 | 8.23:1 | AAA | Lc -93.0 | Preferred for body text |
| Black text on #424D75 | 2.55:1 | Fails | Lc 15.6 | Dividers and decoration only |
| #424D75 text on white | 8.23:1 | AAA | Lc 88.4 | Fine for body text |
| #424D75 text on black | 2.55:1 | Fails | Lc -13.8 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 800.
-
Step 50
50
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E7EAF2
oklch(93.7% 0.011 269.5)
-
Step 200
200
#D4D9E8
oklch(88.6% 0.021 271.2)
-
Step 300
300
#B7C0DB
oklch(80.9% 0.039 270.9)
-
Step 400
400
#929FC9
oklch(70.7% 0.063 271.3)
-
Step 500
500
#7887BB
oklch(63.2% 0.081 271.6)
-
Step 600
600
#6170A7
oklch(55.6% 0.088 271.7)
-
Step 700
700
#505D90
oklch(49% 0.084 272.1)
-
Step 800
800 (this color)
#424D75
oklch(42.9% 0.068 271.6)
-
Step 900
900
#37405E
oklch(37.7% 0.053 270.9)
-
Step 950
950
#202637
oklch(27.1% 0.033 269.2)
#424D75 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #3F5177 | 0.012 |
| Deuteranopia (no green cones) | #3B4D74 | 0.010 |
| Tritanopia (no blue cones) | #31555B | 0.061 |
| Achromatopsia (no color) | #4F4F4F | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #424D75
#424D75
oklch(42.9% 0.068 271.6)
- #5D4E1F
#5D4E1F
oklch(42.9% 0.068 91.6)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #424D75, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk #4E5481 ΔE 0.033
- YInMn Blue #415A77 ΔE 0.039
- Twilight #4E518B ΔE 0.042
- Dusty Grape #545775 ΔE 0.043
- Light Navy Blue #2E5A88 ΔE 0.046
- Dusk Blue #26538D ΔE 0.048
- Light Navy #155084 ΔE 0.049
- Deep Sea Blue #015482 ΔE 0.054
Use #424D75 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.